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With the lens removed, you can see the driving part of the focusing mechanism. The lens is oriented to the body by the large key at the bottom of the lens port. The lens is secured by the rear knurled ring on the lens and released by the small lever on the right side (left, in this view) of the tripod socket pad. A metal finger protrudes from the rangefinder section into the top of this port and engages a cammed inner cylinder in the lens barrel. Focusing can be done by turning the outer knurled ring on the lens or with the knurled wheel on the bottom of the camera. The toothed ring on the perimeter of the lens port engages two toothed sections on the focusing cylinder of the lens.

The Ektra's rangefinder base is 103/104mm (I've seen both quoted), making it among the most accurate camera rangefinder ever produced. This would have been necessary for accurate focusing of the 254mm tele lens that was originally planned for the Ektra. Finally, the longest lens produced was the 153mm f /4.5.



	With the lens removed, you can see the driving part of the focusing mechanism. The lens is oriented to the body by the large key at the bottom of the lens port. The lens is secured by the rear knurled ring on the lens and released by the small lever on the right side (left, in this view) of the tripod socket pad. A metal finger protrudes from the rangefinder section into the top of this port and engages a cammed inner cylinder in the lens barrel. Focusing can be done by turning the outer knurled ring on the lens or with the knurled wheel on the bottom of the camera. The toothed ring on the perimeter of the lens port engages two toothed sections on the focusing cylinder of the lens. The Ektra's rangefinder base is 103/104mm (I've seen both quoted), making it among the most accurate camera rangefinder ever produced. This would have been necessary for accurate focusing of the 254mm tele lens that was originally planned for the Ektra. Finally, the longest lens produced was the 153mm f /4.5.

	Most outfits had only one of the 50mm lens variants. Here are images of the 50mm f /3.5, ($60 ca 1941) not included in Luigi's outfit. The larger lens is obviously much faster, but the smaller lens is generally thought to be sharper and better color corrected.
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